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3 years ago

Which best explains why the auricle is bent and folded?

Chemistry

1 answer:

andrey2020 [161]3 years ago

4 0

Answer:

to increase the surface area

Explanation:

dk not that sure but hope it helps

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A 225 g sample of french fries supplies 460 kilocalories of energy. 65% of those calories come from fat, which supplies 9 kiloca

brilliants [131]

The french fries gives 460 kilocalories and 65% of those calories come from fat. Then, calorie that comes from fat would be: 65% * 460 kcal= 299 kcal

Fat gives energy about 9kcal/gram. Then, the total mass of fat in the french fries would be: 299 kcal/ (9kcal/g)= 33.22 grams

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4 years ago

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Express in scientific notation. Make sure your answer has the same number of significant figures as the starting value. (6.0 x 1

Salsk061 [2.6K]

Since both numbers contain 2 significant digits the answer will contain 2 significant digits:

Answer: b 1.9 x 104

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4 years ago

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Fully explain, why each characteristic would or would not favor the formation of an amorphous solid

WARRIOR [948]

Answer:

Crystalline solids have regular ordered arrays of components held together by uniform intermolecular forces, whereas the components of amorphous solids are not arranged in regular arrays. The learning objective of this module is to know the characteristic properties of crystalline and amorphous solids. When cleaved or broken, they produce fragments with irregular, often curved surfaces; and they have poorly defined patterns when exposed to x-rays because their components are not arranged in a regular array. An amorphous, translucent solid is called a glass.

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3 years ago

A double replacement reaction has two compounds as reactants. True or false

Vadim26 [7]

Answer:

yes, A double replacement reaction has two compounds as reactants.

hence it's true.......

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3 years ago

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How many atoms in the pictured molecule can form hydrogen bonds with water molecules?

ddd [48]

Answer:

3

Explanation:

Please, find the image with the pictured molecule for this question attached.

The molecule has one oxygen atom (red) covalently bonded to one hydrogen atom (light grey), one nitrogen atom (blue) covalently bonded to two hydrogen atoms (light grey), and two carbon atoms (dark grey) bonded each to two hydrogen atoms (light grey).

Hydrogen bondings are intermolecular bonds (bonds between atoms of two different molecules not between atoms of the same molecule). The hydrogen bonds are attractions between the positive end of one hydrogen atom and the negative end of a small atom of other molecule (N, O, or F).

Since, nitrogen and oxygen are much more electronegative than hydrogen atoms, you conclude that:

The two hydrogen atoms covalently bonded to the nitrogen atoms have considerably partial positive charge.

The hydrogen atom covalently bonded to the oxygen atom also has a a relative large partial positive charge.

So, those are three ends of the molecule that can form hydrogen bonds with water molecules.

The hydrogen bondings are only possible when hydrogen is covalently bonded to N, O or F atoms.

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3 years ago